broadcast on screen changed

stepmania/src/MessageManager.cpp

@@ -68,6 +68,7 @@ static const char *MessageNames[] = {
 	"LessonFailed",
 	"StorageDevicesChanged",
 	"AutoJoyMappingApplied",
+	"ScreenChanged",
 };
 XToString( Message, NUM_Message );
 

stepmania/src/MessageManager.h

@@ -63,6 +63,7 @@ enum Message
 	Message_LessonFailed,
 	Message_StorageDevicesChanged,
 	Message_AutoJoyMappingApplied,
+	Message_ScreenChanged,
 	NUM_Message,	// leave this at the end
 	Message_Invalud
 };

stepmania/src/ScreenManager.cpp

@@ -673,6 +673,8 @@ Screen *ScreenManager::ActivatePreparedScreenAndBackground( const RString &sScre
 	LOG->Trace("... PushScreen");
 	PushLoadedScreen( ls );
 
+	MESSAGEMAN->Broadcast( Message_ScreenChanged );
+
 	return ls.m_pScreen;
 }